Hydraulic counterbalance for rolling-mills.



PATENTED NOV. 5, 1907. A. K. HAMILTON & A. T. KELLER. HYDRAULICOOUNTERBALANOE FOR ROLLING MILLS.

APPLICATION FILED NOW/14,1905.

4 SHEETS-SHEET 1.

INVENTORS- THE Ho RRls PETERS 6a., WASHINGYON, nv c.

No. 870,285. PATENTED NOV. 5, 190?.

A. K. HAMILTON & A. T. KELLER.

HY DRAULIG GOUNTERBALANGE FOR ROLLING MILLS.

APPLICATION FILED N0V.24.1905A 4 SHEETS-SHEBT 2.

WITNESSES INVZTORS A? 44/:

THE NDRRIS PErERs co.. wasnmarou, n. c

' noflsvmzs's. PATENTBD NOV. 5, 1907.

A. K. HAMILTON & A T KELLER. Y HYDRAULIC COUNTERBALANGE FOR ROLLINGMILLS.

APPLIGATION FILED NOV. 24, 1905.

4 SEEETS-SHEET 3 WITNESSES I INVENTORS a. 4, JWZ 2 M 7n: "cams FETERS0a., WASHINGTON, n, c.

No. 870,285. PATENTED NOV. 5, 1907.

A. K. HAMILTON & A. T. KELLER. HYDRAULIC COUNTERBALANUE FOR ROLLINGMILLS.

APPLICATION FILED NOV. 24, 1905.

4 SHEETS-SHEET 4.

INVENTORS afiwa' @4177, M

- 1 i E w E a w riq: mmms pz-rzns co.. WASHINGTON, n. c.

UNITED STATES PATENT OFFICE,

ALEXANDER K. HAMILTON, OF NEW BRIGHTON, NEW YORK, AND ALBERT KELLER, OFPITTSBURG, PENNSYLVANIA; SAID KELLER ASSIGNOR OF ONE-HALF OF HIS RIGHTTO MESTA MACHINE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFPENN- SYLVANIA.

HYDRAULIC GOUNTERBALANCE FOR ROLLING-MILLS.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed November 24, 1905- Serial No. 288,888.

To all whom it may concern:

Be it known that we, ALEXANDER K. HAMILTON, of New Brighton, borough ofRichmond, New York, and ALBERT T. KELLER, of Pittsburg, Alleghenycounty, Pennsylvania, have invented a new and useful HydraulicCounterbalance for Rolling-Mills, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure 1 is anend elevation of a rolling mill embodying our invention; Fig. 2 is ahorizontal section on the line II II of Fig. 1; Fig. 3 is a verticalsection on the irregular line III-III of Fig. 2; and Fig. 4 is a viewshowing a modification of the counterbalancing arrangement.

Our invention relates to the class of hydraulic counterbalances forrolling mills, the object being to provide simple and etlicientcounterbalancing means for the movable roll which are so located as notto interfere with the movable rolls or with the free access to the scalepits, and in which the hydraulic actuating cylinders are so situated,where they will not be affected by hot scale falling from the rolls.

Other objects and advantages of our invention will hereinafter appear.

In the accompanying drawings, 2, 2 designates the roll housings in whichare mounted the bearings 3, 3 for the lower roll f and the movablebearings 5, 5 for the upper roll (3. I

7 indicates the driving couplings for the rolls, and 8 the drivingspindles.

9 designates any usual or suitable gearing for securing the verticaladjustment of the upper rolls 6.

10 is a horizontally arranged lifting beam below the roll housing andloosely connected at ll to upwardlyextendiug lugs 12 of cross heads 13to which are connected the vertical lifting rods 14 which engage thelower bearings 5 of the upper roll 6.

14 is a hydraulic cylinder whose plunger 15 is connected to one arm 16of a bell crank lever keyed to a shaft 17, and the other arm 18 of whichis connected by a link 19 with one end portion of the lifting beam 10.

20 indicates a suitable supporting guide for the plunger l5.

21 designates a second hydraulic cylinder whose plunger 22, carried by ayoke 23, is connected by a bar or link 24 with one arm 25 of a bellcrank lever keyed to i a shaft 26 and whose other arm 27 is connected bylink 28 with the other end of the lifting beam 10, the shaft 26 beinglocated at the opposite end of the mill from the shaft 17. The cylinders14 and 21 are supported on one of the ties 29, and these ties also carrythe bearings for the shafts 17 and 26. The cross-head 30 of the frame 23can be provided with a supporting shoe or guide 31 similar to the shoeor guide 20 for the plunger 15.

The cylinder 14 is supplied with an actuating fluid at 14 from anysuitable source, and the cylinder 21 is similarly supplied at 21 thesupply connections being located at opposite ends of the respectivecylinders. The cylinder 21 is larger than the cylinder 15 for. thereason that said cylinder through the connections above described hasthe additional work to perform of carrying the weight of the upper rollcouplings 7 and the partial weight of the upper spindles 8.

In operation, the actuating'fiuid being admitted to the cylinders 14 and21, the plungers 15 and 22 are moved in opposite directions, therebyactuating the two bell crank levers and their respective shafts 17 and26, and thereby, through the links 19 and 2S, raising the lifting beam10, the cross-heads 12 and the lifting rods 14 and causing the bearingsfor the roll 6 to follow the slacking of the adjusting screws. Thelifting rods 14, as will be seen, support the roll 6, the load beingtransmitted through the connections described to the cylinders 14 and2], and the fluid in such cylinders being displaced by the reversemovement of the plungers as the roll 6 is moy ed downwardly by theadjusting screws. In this manner the said roll is at all times perfectlycounterbalanced.

Instead of employing a continuous lifting beam as above described, I mayemploy two beams 10, 10 as shown in Fig. 4, said beams being pivoted attheir inner end portions, and each of them supporting one of the movableroll bearings. In this arrangement one of the cylinders is connected tothe outer end portion of each beam, and the two cylinders are also shownas being arranged at opposite ends of the mill. I

' The cylinders being located outside of the housings, do not in any wayobstruct access to the scale pit, and are themselves away from thefalling scale from the rolls.

We do not, however, wish to limit ourselves to the particulararrangement of the cylinders which we have shown and described, sincesuch arrangement together with the connections for actuating the liftingbeanimay be varied without departing from our invention.

What we claim is 1. In a rolling mill, a vertically movable roll, alifting member supporting the bearing for the roll, a lifting beam foractuating the lifting member, said beam being located below the rollhousings and extending in a direction substantially parallel to the rollaxes, motive devices located outside of the roll housings in thedirection of the length of the beam, and an actuating connection betweenthe motive devices and the beam for raising it and thereby the rollbearing and roll substantially as described.

2. In a rolling mill, a vertically movable roll, a lifting membersupporting the roll bearing, a lifting beam for achurting" the liftingmember, said beam being located below the roll housings and extending ina direction parallel to the roll axes, hydraulic cylinders outside ofthe roll housing and at one end of the beam, and an actuating connectionbetween the piston of the cylinders and the beam; substantially asdescribed.

3. [n a rolling mill, a vertically movable roll, a lifting inelnhersupporting the roll' bearing, a lifting beam for actuating the liftingmember, said beam being located below the roll housings and extending ina direction paral lel to the roll axes, hydraulic cylinders outside ofthe roll housing and at one end of the beam, and actuating connectionsfrom the piston of. one cylinder to one end portion of the beam, andactuating connections from the piston of the other cylinder to theopposite end portion of said beam I substantially as described.

4. In a rolling mill, the combination with lifting rods for the movableroll bearings and crossheads carrying the said rods, of a beam below theroll housings towvhich the cr0ssheads are connected, bell cranksconnected to the end portions of the beam, and l1 'draulic cylinders connected to the bell cranks; substantially as described.

5. In a rolling; mill, the combination with movable roll bearings, ot' avertically movable beam below the roll housings, means carried by thebeam for supporting the roll bearings, bell-crank levers at oppositeends of the mill and connected to the beam, and a hydraulic cylinderconnected to each bell crank lever; substantially as described.

In testimony whereof, we have hereunto set our hand.

ALEXANDER K. HAMILTON. ALBERT 'i. KELLER. Witnesses JOHN A. Scnnonnnn,GEO. L. Runs.

